Fernandez has insisted there’s nothing to be concerned about, per Cadena Ser :

[Messi] will renew, as I’ve always said. He is happy in Barcelona, he feels comfortable in the team and the environment is perfect. I don’t have any doubt [that he’ll sign a new deal]. Looking into his eyes I see that he is happy at Barcelona.

I don’t want to speak too much, though, as I know that there are many repercussions with this topic.

[Iniesta] will also renew and he’ll do it in his own time. I have no doubt that he’ll renew and neither does he.

Leo Messi has scored 40+ goals in a season for eight years in a row! 😱Yet another Laureus Award Nomination in sight? pic.twitter.com/fqtitW3GE8